Review of current fire design rules for cold-formed steel wall systems

Gunalan, Shanmuganathan; Mahendran, Mahen

doi:10.1177/0734904113488336

Cited by 14 publications

(17 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gunalan and Mahendran [14] reviewed the above mentioned fire design rules and compared the design rule predictions with their fire test and finite element analysis results [12,13]. Using this comparison, they proposed improved fire design rules [2] based on Eurocode 3 Part 1.3 [3] and AS/NZS 4600 [4] for LSF walls exposed to standard fires.…”

Section: Review Of Fire Design Rulesmentioning

confidence: 99%

“…Many researchers have investigated the behaviour of LSF wall studs at both ambient and elevated temperatures and proposed suitable fire design rules for standard fire exposure [5][6][7][8][9][10][11][12][13][14]28]. These design rules were mainly based on available design manuals and standard codes of practice.…”

Section: Review Of Fire Design Rulesmentioning

confidence: 99%

“…Alfawakhiri [5], Klippstein [6], Gerlich [7], Feng and Wang [8], Ranby [9], Kaitila [10], and Zhao et al [11] conducted detailed studies on the LSF wall systems used in Canada, USA, New Zealand and Europe. Recently Gunalan et al [12] and Gunalan and Mahendran [13,14] conducted similar studies on LSF wall systems used in Australia, in particular, LSF wall panels made of high strength steel studs and various wall configurations including cavity and external insulations made of rock wool, glass fibre and cellulose fibre. However, all these studies were for LSF wall panels exposed to the standard fire time-temperature curve given in [1].…”

Section: Introductionmentioning

confidence: 95%

“…Past researches [5][6][7][8][9][10][11][12][13][14] have proposed design rules to predict the axial compression capacity of steel studs subject to non-uniform elevated temperature distributions and the FRR of LSF wall panels, but they were developed for standard fire conditions. Recently Gunalan and Mahendran [2] proposed improved design rules based on Eurocode 3 Part 1.3 [3] and AS/NZS 4600 [4] to determine the axial compression capacity of LSF wall studs.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fire design rules for load bearing cold-formed steel frame walls exposed to realistic design fire curves

Ariyanayagam

Mahendran

2015

Fire Safety Journal

Self Cite

View full text Add to dashboard Cite

Keywords:Light gauge steel frame walls Realistic design fire curves Axial compression strength of studs Fire resistance rating Limiting temperature method Fire design rules Simplified design method a b s t r a c t Light gauge Steel Frame (LSF) walls are extensively used in the building industry due to the many advantages they provide over other wall systems. Although LSF walls have been used widely, fire design of LSF walls is based on approximate prescriptive methods based on limited fire tests. Also these fire tests were conducted using the standard fire curve (ISO 834-1, 1999 [1]) and the applicability of available design rules to realistic design fire curves has not been verified. This paper investigates the accuracy of existing fire design rules in the current cold-formed steel standards and the modifications proposed by previous researchers. Of these the recently developed design rules by [2] based on Eurocode 3 Part 1.3 (EN 1993(EN -1-3, 2006) and AS/NZS 4600 (Standards Australia (SA), 2005 [4]) for standard fire exposure (ISO 834-1, 1999 [1]) were investigated in detail to determine their applicability to predict the axial compression strengths and fire resistance ratings of LSF walls exposed to realistic design fire curves. This paper also presents the fire performance results of LSF walls exposed to a range of realistic fire curves obtained using a finite element analysis based parametric study. The results from the parametric study were used to develop a simplified design method based on the critical hot flange temperature to predict the fire resistance ratings of LSF walls exposed to realistic fire curves. Finally, the stud failure times (fire resistance rating) obtained from the fire design rules and the simplified design method were compared with parametric study results for LSF walls lined with single and double plasterboards, and externally insulated with rock fibres under realistic fire curves.

show abstract

Section: Review Of Fire Design Rulesmentioning

confidence: 99%

Section: Review Of Fire Design Rulesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fire design rules for load bearing cold-formed steel frame walls exposed to realistic design fire curves

Ariyanayagam

Mahendran

2015

Fire Safety Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…Inevitably, they can be exposed to fires as seen in Figure 1. Recent research has improved the understanding of the behaviour of LSF walls under fire conditions [1][2][3][4][5]. In practical applications, cold-formed steel studs are likely to be protected by plasterboards and insulations, resulting in studs being subject to a non-uniform temperature condition during a fire.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of fire exposed lipped channel columns subject to distortional buckling

Gunalan

Mahendran

2014

Fire Safety Journal

Self Cite

View full text Add to dashboard Cite

Cold-formed steel sections are commonly used in low-rise commercial and residential buildings. During fire events, cold-formed steel structural elements in these buildings are exposed to elevated temperatures. Hence after such events there is a need to determine the residual strength of these structural elements. However, only limited information is available in relation to the residual strength of fire exposed cold-formed steel members. This research is aimed at investigating the residual distortional buckling capacities of fire exposed cold-formed steel lipped channel sections. A series of compression tests of fire exposed, short lipped channel columns made of varying steel grades and thicknesses was undertaken in this research. Test columns were exposed to different elevated temperatures up to 800 o C. They were then allowed to cool down at ambient temperature before they were tested to failure. Suitable finite element models of tested columns were also developed and validated using test results. The residual compression capacities of tested columns were predicted using the ambient temperature cold-formed steel design rules (AS/NZS 4600, AISI S100 and Direct Strength Method). Post-fire mechanical properties obtained from a previous study were used in this study. Comparison of results showed that ambient temperature design rules for compression members can be used to predict the residual compression capacities of fire exposed short or laterally restrained cold-formed steel columns provided the maximum temperature experienced by the columns can be estimated after a fire event. Such residual capacity assessments will allow structural and fire engineers to make an accurate prediction of the safety of buildings after fire events. This paper presents the details of these experimental and numerical studies and the results.

show abstract